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Ungual Tuft
In mammals, ungual tufts are tufts of hairs at the base of claws of the forefeet and hindfeet. Their presence has been used as a character in cladistic studies of the Cricetidae, a large family of rodents.Weksler, 2006, p. 19 Rice rats Members of the tribe Oryzomyini ("rice rats"), in the Cricetidae subfamily Sigmodontinae, normally have ungual tufts, but they may be reduced or absent in semiaquatic species (i.e. those adapted to life in the water).Weksler, 2006, p. 81 ''Lundomys molitor'', '' Nectomys apicalis'', the marsh rice rat (''Oryzomys palustris''), and species of ''Holochilus'' lack ungual tufts on their forefeet.Weksler, 2006, p. 23 On the hindfeet, most species have well-developed ungual tufts only on the second to fifth toes, but '' Sooretamys angouya'' and '' Eremoryzomys polius'' also have thick tufts on the first toe. '' Pseudoryzomys simplex'', '' Mindomys hammondi'', '' Nectomys squamipes'', ''Sigmodontomys alfari'', '' Oryzomys couesi'', the marsh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammal
Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles (including birds) from which they diverged in the Carboniferous, over 300 million years ago. Around 6,400 extant species of mammals have been described divided into 29 orders. The largest orders, in terms of number of species, are the rodents, bats, and Eulipotyphla (hedgehogs, moles, shrews, and others). The next three are the Primates (including humans, apes, monkeys, and others), the Artiodactyla ( cetaceans and even-toed ungulates), and the Carnivora (cats, dogs, seals, and others). In terms of cladistics, which reflects evolutionary history, mammals are the only living members of the Synapsida (synapsids); this clade, together with Saur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nectomys Squamipes
''Nectomys squamipes'', also known as the Atlantic Forest nectomys, South American water rat, or scaly-footed water rat, is a semiaquatic insectivorous rodent species. It is from Argentina, Brazil, and Paraguay — found primarily near forest rivers and streams in the Atlantic Forest ecoregion. Description ''Nectomys squamipes'', or the South American water rat can be distinguished from other Sigmodontinae based on their size and morphology of their hindfeet. They are the largest of the family (average of 216g) and have long hind legs with partially webbed feet to aid in swimming and have completely scaled heels. ''Nectomys'' is derived from Greek words meaning "mouse" and "swimming". One unique morphological characteristic is the distinct primitive cuspidate pattern of their cheekteeth, which have hypsodont molars, teeth crowned earlier in life and the outer fold of the upper molars tend to be more isolated as enamel islands. The ''Nectomys squamipe'' tends to have relativel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batomys Russatus
Dinagat hairy-tailed rat or russet batomys (''Batomys russatus'') is one of five species of rodent in the genus '' Batomys''. It is in the diverse family Muridae. This species is endemic to the Philippines. Distribution This rat is found on Dinagat Island and possibly on other islands nearby. Further surveys have yet to be carried out, but it is currently endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ... according to the IUCN. References Rats of Asia Batomys Endemic fauna of the Philippines Fauna of Dinagat Islands Rodents of the Philippines Mammals described in 1998 {{Murinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batomys Hamiguitan
The Hamiguitan hairy-tailed rat (''Batomys hamiguitan'') is one of five species of rodent in the genus Batomys. It is in the diverse family Muridae. This species is found only in the Philippines. is a yellow-brown animal with a long furry tail, weighs about 175 grams, and is related to several other species known in Central Mindanao, Dinagat Island and Luzon. It lives only in an area that's at least 950 meters high, and in dwarf mossy forests less than 10 square kilometers. It was the last member of its genus to be discovered in May 2006. According to team leader and lead author Danilo Balete, "Hamiguitan batomys is the first mammal to be described from Eastern Mindanao, and the first thought to live only in that area." This species corroborates the hypothesis that the island of Mindanao has multiple centers of endemism, of which the southeastern highland of Mount Hamiguitan Mount Hamiguitan is a mountain located in the province of Davao Oriental, Philippines. It has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batomys
''Batomys'' is a genus of rodent endemic to the Philippines. It has six extant described species. Species Genus ''Batomys'' - Luzon and Mindanao forest rats, 7 species recognized, six extant and one extinct: * Large-toothed hairy-tailed rat, ''Batomys dentatus'' *Luzon hairy-tailed rat, ''Batomys granti'' *Hamiguitan hairy-tailed rat, ''Batomys hamiguitan'' *Dinagat hairy-tailed rat, ''Batomys russatus'' *Mindanao hairy-tailed rat, ''Batomys salomonseni'' *''Batomys uragon'' * ''Batomys cagayanensis ''Batomys'' is a genus of rodent endemic to the Philippines. It has six extant described species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species i ...'' References Rodents of the Philippines Rodent genera Taxa named by Oldfield Thomas Batomys {{Murinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murinae
The Old World rats and mice, part of the subfamily Murinae in the family Muridae, comprise at least 519 species. Members of this subfamily are called murines. In terms of species richness, this subfamily is larger than all mammal families except the Cricetidae and Muridae, and is larger than all mammal orders except the bats and the remainder of the rodents. Description The Murinae are native to Africa, Europe, Asia, and Australia. They are terrestrial placental mammals. They have also been introduced to all continents except Antarctica, and are serious pest animals. This is particularly true in island communities where they have contributed to the endangerment and extinction of many native animals. Two prominent murine species have become vital laboratory animals: the brown rat and house mouse are both used as medical subjects. The murines have a distinctive molar pattern that involves three rows of cusps instead of two, the primitive pattern seen most frequently in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tylomyinae
The subfamily Tylomyinae consists of several species of New World rats and mice including the vesper and climbing rats. They are not as well known as their relatives in the subfamilies Sigmodontinae and Neotominae. Many authorities place all three of these subfamilies in a single subfamily, Sigmodontinae. List of Species *SUBFAMILY TYLOMYINAE **Tribe Nyctomyini ***Genus ''Otonyctomys'' ****Hatt's vesper rat, ''Otonyctomys hatti'' ***Genus ''Nyctomys'' ****Sumichrast's vesper rat, ''Nyctomys sumichrasti'' **Tribe Tylomyini ***Genus ''Tylomys'' ****Chiapan climbing rat, ''Tylomys bullaris'' ****Fulvous-bellied climbing rat, ''Tylomys fulviventer'' ****Mira climbing rat, ''Tylomys mirae'' ****Peters's climbing rat, ''Tylomys nudicaudus'' ****Panamanian climbing rat, ''Tylomys panamensis'' ****Tumbala climbing rat, ''Tylomys tumbalensis'' ****Watson's climbing rat, ''Tylomys watsoni'' ***Genus ''Ototylomys'' ****Big-eared climbing rat, ''Ototylomys phyllotis'' **** La Pera big-ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrawayaomys
Ruschi's rat or Ruschi's spiny mouse (''Abrawayaomys ruschii'') is a rodent species found in Argentina and Brazil. Some cranial features suggest it may be an archaic relative of the paramo Oldfield mouse (''Thomasomys paramorum''). The upper parts are greyish yellow with a darker head and yellowish-white underparts. Fine hairs are mixed with flattened and grooved spines that are most numerous on the back.Walker's Mammals of the World (6th Edition, 1999) by Ronald M. Nowak, The Johns Hopkins University Press, Baltimore and London. Taxonomy This rat was first described by Cunha and Cruz in 1979 and is named in honour of the Brazilian naturalist Augusto Ruschi (1915 - 1986). Description A medium-sized rodent, Ruschi's rat has a broad head and rounded ears. Adults have a total length of between , about half of which is the tail. The fur is short and dense. Some of the hairs are slender while others are spiny, especially on the back and rump; each spiny hair is flattened and stiff, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calomys Cerqueirai
''Calomys cerqueirai'' is a species of rodent in the genus ''Calomys'' from southeastern Brazil. Distinct from other ''Calomys'' in its karyotype and characters of the fur, it is known only from two places in Minas Gerais. The karyotype was first described in 1996 and the species was formally named in 2010. Taxonomy In 1996, Geise and coworkers described a new karyotypic variant of ''Calomys'' from Lagoa Santa, Minas Gerais with 36 chromosomes and a fundamental number of 66 autosomal arms ( 2n = 36, FNa = 66), and a 2007 genetic analysis confirmed that the new variant represents an evolutionary lineage separate from other ''Calomys'' species. In 2010, Bonvicino and others described another karyotypic variant from Capitão Andrade, also in Minas Gerais, with 2n = 38 and FNa = 66, and concluded that both karyotypic variants represented a single, previously undescribed species, which they named ''Calomys cerqueirai''. The specific name honors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akodon Paranaensis
''Akodon'' is a genus consisting of South American grass mice. They mostly occur south of the Amazon Basin and along the Andes north to Venezuela, but are absent from much of the basin itself, the far south of the continent, and the lowlands west of the Andes. ''Akodon'' is one of the most species-rich genera of Neotropical rodents. Species of ''Akodon'' are known to inhabit a variety of habitats from tropical and tropical moist forests to altiplano and desert. Fossils are known from the late Pliocene onwards. Taxonomy ''Akodon'' is the largest genus in the tribe (biology), tribe Akodontini. Three of its synonym (taxonomy), synonyms—''Chalcomys'', ''Hypsimys'', and particularly ''Microxus''—have sometimes been regarded as distinct genera. Neomicroxus was separated in 2013. Previously associated with ''Akodon'', the genera ''Abrothrix'', ''Deltamys'', ''Necromys'', ''Thalpomys'', and ''Thaptomys'' are currently recognized as distinct. Some species of the tribe Abrotrichini ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrothrix Lanosus
''Abrothrix lanosus'', also known as the woolly grass mouse or woolly akodont,Musser and Carleton, 2005, p. 1089 is a species of rodent in the family Cricetidae. It is found in southern Argentina and Chile. It was previously classified in the genus ''Akodon'' rather than ''Abrothrix ''Abrothrix'' is a genus of rodent in the tribe Abrotrichini of family Cricetidae. It contains the following living species:Teta et al., 2017 *''Abrothrix andina'' *''Abrothrix hershkovitzi'' *''Abrothrix hirta'' *''Abrothrix illutea'' *''Abrothri ...''. References Literature cited *Musser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. Pp. 894–1531 in Wilson, D.E. and Reeder, D.M. (eds.)Mammal Species of the World: a taxonomic and geographic reference. 3rd ed Baltimore: The Johns Hopkins University Press, 2 vols., 2142 pp. *Pardinas, U. and D'Elia, G. 2008. . In IUCN. IUCN Red List of Threatened Species. Version 2009.2.www.iucnredlist.org. Downloaded on January 12, 2010. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigmodontomys Aphrastus
''Tanyuromys aphrastus'', known as the long-tailed sigmodontomys, Harris's rice water rat, or the long-tailed rice rat, is a species of rodent in the family Cricetidae. It is known from Costa Rica, Panama, and Ecuador. In 2012, it was reassigned to its current genus from ''Sigmodontomys ''Sigmodontomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae. It is related to ''Nectomys'' and ''Melanomys'' and used to be included in ''Nectomys''. It includes two species, ''Sigmodontomys alfari'' and the much rarer ''S ...''. References Rodents of Central America Mammals of Ecuador aphrastus Mammals described in 1932 Taxonomy articles created by Polbot {{Sigmodontinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
